Soaking pit



July 21, 1925. 1,546,533

T F. BAILY SOAKING PIT Filed March 18. 1924 gum'ulul "qu d Patented July 21, 1925.

UNITED STATES THADDEUS F. BAILY, OF ALLIANCE, OHIO.

SOAKING PIT.

Application filed March 18, 1824. Serial No. 700,003.

To all 114mm it may concern:

lie it known that l. 'linnnizt s 1. DAILY.

a. citizen of the l uitcd States. residing at Alliance, in the countv of Stark and State of Ohio. have inventei certain new and useful Improvements in Soaking Pits. of which the following is a specification. I

This invention relates to soaking pits and has for its objects to provide a gas tight soaking pit, in which hollow partition walls divide the pit into a plurality of holes. heating means such as electric resistance elements being located through the hollow partition walls to heat the ingots in a nonoxidizin atmosphere.

The above and other objects may be attained by constructing the soaking pit. in the manner illustrated in the accompanying drawing, in which Figure 1 isa longitudinal. sectional view through a soaking pit embodying the inventron;

Fig. 2, a section on the hne 2f2, Fig. l; and

Fig. 3, a' transverse section through a partition wall of slightly modified construction.

Similar numerals refer to similar parts throughout the drawing.

The pit may comprise a rectangular foundation 1 of refractory material built below the level of the floor 2 and divided into a plurality of holes 3 as by partition walls 4. which are preferabl formed of carbide of silicon or similar material. End walls 5 ol' the same construction as the partition walls 4, are provided in each end of the pit. forming the outer side walls of the end holes.

Each of these partitions and side walls of the hole; is hollow. preferably having two longitudinal passages 6 adapted to contain heating means such as an ele tric heating element comprising the granular carbonaceous material 7, into each end of which is inserted an electrode 8 connected to anclet'ric circuit, whereby the current passing through the carbonaceous material from one electrode to the other. heats the same to the desired temperature.

The, upper and lower heating elements in each wall thus provide for heating the upper and lower portions of the hole. uniformly and are separated by a horizontal partition 9 also formed of carbide of si icon or other material. which will not reduce in the pres ence of carbon.

The bottom 10 of each hole is also formed of a material which will not reduce in the presence of carbon and the usual clean-out aperture 11 is provided therein.

sand trough 12 is pret'erablv provided around the upper edge of each hole toreccive the depending flange 13 formed around the edge of each cover 14. which is preferably formed of tire brick with a steel or iron covering. a ring 15 being provided therein for removing the cover.

In Fig. 3 is shown a modified term of partition or side wall for each hole. in this construction, the. upper and lower hollow or tubular containers for the resistance elements arc indicated at It and 17 respective ly and are spaced by means of a horizontal partition 15 of suitable refractory material, said partition extending outward upon each side of the wall as indicated at 1.) in order to support the ingots away from the rcsistnnce elements. 7

1n charging the soaking pit, the cover is removed from the hole to be charged and the ingots shown at 20 are charged through the open top of the. hole, being placed in up right position as shown in the drawing. (.oke breeze or other granular carbon is placed in the bottom of the hole to provide a non-oxidizing atmosphere.

After the hole is charged the cover is placed thereon. the sand seal providing a gas tight hole in which the ingots are soaked. and the heating elements being located through the hollow side walls of the holes are thus kept out of the furnace atmosphere.

From the above, it will be seen that by constructing the. soaking pit in the manner illustrated, no additional space is required for accommodating the heating elements as they are located through the partition walls and side walls of the holes, which walls are necessary in the ordinary construction.

It willalso be seen that the ingots are soaked in a non-oxidizing atmosphere, since each hole is made gas tight and it cut oil from the heating elements by the partition walls.

Further, the non-oxidizing atmosphere is ma ntained in each hole. by placing coke breeze or the like upon the bottom of the hole.

I claim:

1. A soaking pit havin a plurality of holes lined with carbide o silicon or other material which will not reduce in the pres- Y ence of carbon and electric heating elements located through the side walls of the holes.

2. A soakin .pit havin a plurality of holes and a fiurality of ieatin' elements located through the side walls 0. the holes, one of said elements being arranged to deliver heat at the upper part of each hole and another element being arranged to deliver heat at the lower part of the hole.

3. A soaking pit having a substantially hollow partition wall containing a resistance element such as broken carbon. the outer face of the wall forming the side wall of the pit.

4. A soaking pit havin side walls formed of carbide of silicon or 0t er material which will not reduce in the presence of carbon and electric heating elements located within said side walls.

5. A soaking pit having side walls formed of carbide of silicon or other material which will not reduce in the presence of carbon and heating elements located within said side walls.

6. In a furnace for heating ingots in a vertical position. a bottom to support the ingots. an opening in the top of the furnace for charging the ingots. carbide of silicon \valls forming the sides of the furnace and electric heating elements placed in said walls for supplying heat.

7. In a furnace for heating ingots in a vertical position. a bottom to support said ingots. an opening in the top of the fur nacc for charging the ingots. carbide of silicon partition \valls dividing the furnace into a pluralit of compartments and electric heating elements placed in the partition walls for supplying heat.

8. In a furnace for heating ingots in a vertical position. a bottom to support said ingots. an opening in the top of the furnace for charging the ingots. carbide of silicon partition .tll dividing the furnace into a plurality of compartments. and enclosed carbonaceous rcsistancc clcmcnts located in thc partition \valls.

9. In a furnacc for heating ingots in a vertical position. a bottom to support said ingots. an opening in thc top of the furnace for charging thcingots. carbide of silicon partition walls dividing the furnace into a plurality of compartments, and a plurality of resistance elements in each partition wall.

10. In a furnace for heating ingots in a vertical position, a bottom to support said ingots. an opening in the top of the furnace for charging the ingots, partition walls dividing the furnace into a plurality of compartments. upper and lower resistance elements located in each partition wall and a horizontal partition of refractory material located between the upper and lower resistance elements.

11. in a furnace for heating ingots in a vertical position, a bottom to support said ingots, an opening in the top 0 the furonce for charging the ingots, partition walls dividing the furnace into a plurality of compartments, said partition wall being of low electrical comluctivity and clectric heating elements located therein.

12. A closed furnace of the character described provided with enclosed carbonaceous electric heating elements and having a loose t'tll'bfllltlt'tUHS material such as coke breeze upon the bottom to provide a nonoxidiziug atmosphere.

13. A closed type gas tight furnacc having an opening in the top. a sand scaled cover titted over said opcniu". and electric heating elements enclosed in thc valls of the furnace.

14. A closet] type gas tight furnace hav ing an opening in the top. a sand sealed cover fitted over said opening. and clcctric heating elements enclosed in thc sidc walls of the furnace.

l5. closed type gas tight fnl'nat'c having an opening in the top. a sandscalcd cover littcd over said opening. and electric heating clcmcut cn loscd in the walls of thc furnace. and loosc. granular car on on the bottom of the furnace to provide note oxidizing atmosphere.

ltl. closed type gas tight furnace hav ing an opcnlng in the top, a sand sealed cover titled over said opening. clcctric heating elements cnclosed in the side walls of thc furnacc. and loose. granular carbon on the bottom of the furnace to provide nonoxidizing atmosphere.

17. soaking pit divided into a pinrality of gas tight holcs by means of partition walls. electric llttlllll" elements enclosed in said walls and a sand scaled covcr enclosing the top of each hole.

1H. t'ltlhttl furnace of the character dcscribcd provided with carlmnaccous electric heating elements and having a l ose carlmnaccous matcrial such as cokc brccze upon the bottom to provide a non-oxidizing atmosphere.

19. A closed t vpc furnace of the character described provided with clcctric resist ance heating means and having a loose carbonaceous material such as (Ulit' brt't-Zc upon the bottom to providc a non-oxidizing atmosphere.

20. A soaking pit for heating ingots in a vertical position having electric resistance elements located in the side-walls and refr: tory ribs upon the sidc walls for suppo.ting the ingots out of contact with the resistance elements.

21. A soaking pit having a gas-ti ht cover and gas tight walls provided \\'|tll spaced upper and lower openings thcrein and heating means within said openings.

22. A soaking pit having a gas-tight 

